@techreport{oai:kumadai.repo.nii.ac.jp:00022369,
 author = {キノシタ, ナオコ and Kinoshita, Naoko and 木下, 尚子},
 month = {Mar},
 note = {application/pdf, 研究報告書, It is said that one of the most remarkable characteristics of the history of the Ryukyus is that the Ryukyu people seem to have established their own kingdom in a very short time after the end of the long Neolithic age in the 12th century. Afterwards the kingdom succeeded in trading with Japan, China and other Southeast Asian countries. In this paper I focus on the period of 400 years from the last part of the Neolithic age to the very beginning of the Ryukyu kingdom and analyze the formation process of that kingdom. I pay attention to the shell-inlaid lacquerware that was the most important trading artifact of Japan to China and Korea at that time.},
 title = {貝交易と国家形成 -9世紀から13世紀を対象に-},
 year = {2003}
}